Safety crank for automobiles



' Feb. 8, 1927.

' v l Imimtof LSa/W/b/j/ d 311% I m.

Attorney 7 gineaceidentally back-fires.

Patented Feb. 8, 1927. p

res

ivIcKoLas J. SARNICKY,

on GAS CITY, i tnrana.

SAFETY CRANK roe. auroivron nna 7 Application filed. May 22,

This invention relates to an improved au tomotive safety appliance, and it has more particular reference to an improved safety hand crank for automobiles.

More specifically,-it has reference to an improved clutch element for engaging the ing onewhich includes novel details arranged in anew combination of elements, producing an improved product of manufacture capable of accomplishing. the desired result in a highly practical manner. I

Inthe accompanying drawings forminga part of this application and in which like numerals are employed to designate like parts throughout the same Figure 1 is an elevational view of parts of a conventional automobile showing the 7 drawing.

improved device associated therewith.

Fig. 2 is an enlarged detail section taken approximately upon the plane'of the line 2--2 of Fig. l.

Fig. 3 is aview on an enlarged scale of the clutch elements. y Fig; 4 is likewise a View of said elements, showing the manner in which it is connected with the hand crank.

Referring to the drawings in detail, the reference character 1 designates generally the hand crank which includes the-usual hand grip 2 and right angularly disposed portions 3 aud t respectively. 7 Adjacentthe 'juncture of the portions 3 and 4:, the last named portion 4: is provided with diametrically opposite keys 5 which. serve a purpose to be hereinafter described. On the free end of this portion 4 is the usual clutchelement 6 having ratchet teeth adapted to engage a cross-pin 7 on the engine shaft 8.. V I

the aforesaid stationary bearings 14 to pre-.

I'hav'e also shown the belt-pulley aim the At this time, I would direct attention ,to' the Figs. 3 and 4, wherein it will be-seen that the portion 1 is provided with a sun. rounding collar'10, this collar having per,

tions of the metal removed from -diamet- 192s. Sie'rialNo. 111,063.

-rically opposite sides as indicated at'11. vThis makes the collars somewhat ovate in configuration; and since. the; tooth carrying clutc'hsleeve :6 is of true circular design,

sides as shown.

It will benO-ticed in' this connection, that the sleeve 6 is fitted onto this collar by friction, andthe friction is depended upon to tight that under ordinary conditions when 1 the hand crank is turned over, itwillalways impart. rotation" to? the engine shaft." ,In event of engine back-fire, l1ow everj, the sleeve 6 will be permitted to .rotate around the collar 10 to prevent breakage. The collar is connected. toithe crank shaft a connecting pin 12 and it will be noticed that the ends of this pin extend beyond the periphery of the collar andv into an annular groove 13 clearance-' spaces are provided on opposite a effect the connection. TheeOnnectiOn is so formed in the sleeve. This prevents endwise displacement of the sleeve.

' An appropriate stationary sign and being preferably .provided with a bushing 15. The improved bearingforming 'minating at'its outer end in an enlarged cup 17 in which a ball clutch 18 is confined. This bearing is inch cated at 14, this being of any suitable declutch, as shown in Fig. 2, comprisesa pock etedhead 19 in the pockets of'which spring pressed balls 20 are arranged and pressed into engagement with a wear surface on the inner periphery of the clutch.

It willbenoticed that'the clutch is provided at its center with a square socket 21 j through which-the hand crank passes. This pock-et'serves to accommodate thev aforesaid I looking key at5. Obviously, 1t 1s necessary to aline the key with diagonally opposite corners of the square sockets'in-order to per-' mit the hand crank to be forced in and coupled to the clutehelements. A coiled spring released. v

' It is yet to 17 is provided with a lug 23 whichengages vent rotation 'of the cup in one direction.

be pointed out that theclutch permit themto enterthe sockethowever. it p r I 22 is employed for forcing the hand crank out of engagement withthe clutch, when it is p is necessary to aline the keys, as before stated with diagonally opposite corners of the pocket. In this Way, the cup 17 and the bearing sleeve 16 are'coupled to the portion t of the hand crank. entire structure, the clutch element 6 may be engaged With the pin onthe engine sha ft in the usual way, and the crank turned over. In case the engine back-fires, the ball locking clutch Will connect the hand crank with the parts 16 and 17 which may be anchored against in any convenient manner, ously, then, this will prevent retrograde rotation' of the hand crank in a well known a manner.

In order, however, to relieve the parts of the invention of undue strain,the clutch element 6 can turn around the collar 10 as be fore explained and, obviously, as soon as the hand crank is released, the spring 22 will force it out and in view of the several features of construction, it is obvious thatthe device will act as a 'safety applia nce and will Thus by rotating the Obvi- 7 invention claimed may be resorted to if desired.

' Having thus described my invention, what I claim as new is:

1. In a safety hand crank, a bearing including a sleeve having a cup at one end,

a wear ring in said cup, a ball clutch fitted cated in said pockets and cooper-able with said wear ring, said head being provided atits center with a. squaresocket, said hand crank being adapted to be provided with I keys cooperable. with said socket to eifect a connection between the crank and clutch.

In testimony whereof I affix my signature.

NIOKOLAS J. SARNIOKY, 1 

